Been travelling!
***Worrying about rear driveshaft damage with WWOR arms is like worrying about your Land Cruiser failing before a Grand Cherokee.

We're already are careful where we place the rear diff...that covers the rear driveshaft too in almost every case.
***What always hangs us up on the trails? Lower arms or the rear driveshaft? LOWER ARMS. What always bends? LOWER ARMS. I have bent my reinforced stock arms numerous times. It's not been strong enough for me. If you address these with WWOR arms then your worries are over. All you need to be careful of is that rear diff. And by the way...IF...IF you HAD to climb a big ledge that was 100% flat and the width of the truck...and you HAD to do it head-on...your driveshaft does not touch first. Folks need to not worry about this. Plus, when the was the last time you climbed a 2-foot tall sidewalk from head on?

Your bumper won't clear it! You would go at a bit of an angle...that protects the rear shaft as well!
***I would not buy any of the dedicated 100-series aftermarket arms I've seen. I would buy a heavier-duty aftermarket 80-series arm. Huge ones like from WWOR or other makers. Then take 5-minutes and install the larger bolts, etc. Have you seen the massive size of some of the aftermarket 80-series arms? They are amazing! Cost is about the same. I also would insist on a Toyota-ish bushing like the WWOR arms have, though the bushing is not a deal-breaker for me. Using 100-arms is though when you can fit better 80-series arms.
***Last...after running the curved WW arms...I could never return to straight ones. It's like adding lockers. You won't go back. Once you clear these ledges and rocks WITHOUT hangin up you won't go back. Seeing them in action proves their merit. David from 4WD Toy Owner Mag confirmed the same thing. ONCE YOU HAVE THEM...YOU ARE SOLD! Don't listen to folks that DO NOT HAVE them and use scare tactics about the rear driveshaft! Ah, hey...I mangled a rear driveshaft on the 100 and BEFORE I had the WWOR arms.